JPH0241605Y2 - - Google Patents

Description

[Detailed description of the invention] The invention has glass segments that are fixed to upper and lower segment frames and whose positions can be adjusted up and down, with the lower segment frame being fixed to one rotating ring. The present invention relates to a universal rotary table for microscopy, in particular for the study of crystal optics, as arranged on the adjusting screw of the adjusting ring.

According to West German Patent No. 579789,
In order to examine objects of various thicknesses, the table has a table that can be moved up and down on which the object is placed, and is adjusted to be higher or lower so as not to cause changes in the azimuth of the object. A universal rotary table for a microscope is well known. For this purpose, the lower ring-shaped segment frame is provided with a screw, into which the adjusting screw of the adjusting ring engages. The adjustment ring has a downwardly projecting tab. When the adjustment ring is rotated, the lower segment frame and the upper segment frame attached thereto move in the optical axis direction. The upper segment frame has sections on both sides that are guided by guide bolts.

With the above-mentioned universal rotary table, it is difficult to operate the segment frame at the bottom, so when making vertical adjustments, the mutual inclination of the individual rotary axes is often changed inadvertently, resulting in the need for time-consuming corrections. Become. Furthermore, the centering of the glass segment by the guide screw is relatively imprecise and requires high precision during fabrication.

Therefore, the object of the present invention is to provide a microscope in which the glass segments are forcibly centered and the segment frame can be adjusted up and down easily and without disturbing the position of the rotation axis of the table. The goal is to create a versatile rotary table.

According to the present invention, the above objects are achieved in the following manner. That is, in a universal rotary table of the kind mentioned at the outset, the upper segment frame is centered and releasably supported with respect to the lower segment frame, and the upper segment frame is centered and releasably supported with respect to both segment frames. An adjustment device is provided, which can be operated from above by means of an operating member and cooperates with an adjustment ring, for adjusting both segment frames together up and down. According to a preferred embodiment of the invention, the adjusting device is actuated by an actuating member which meshes with the internal toothing of the adjusting ring and is insertable.

The operating element used is a knurled torsion rod with a polygonal rod attached thereto, which can be inserted into an adjusting device, for example a pinion. By rotating the torsion rod into which the polygonal rod section is inserted, the small gear meshes with the internal teeth of the adjustment ring, and the rotating screw of the adjustment ring fits into the lower segment frame. Since the upper segment frame is centered relative to and frictionally held against the lower segment frame, common up and down adjustments of both segment frames can be made by rotating the torsion bar. The lower segment frame is then moved up and down in the adjusting ring by means of a screw when the adjusting ring is rotated by the pinion.

The accompanying drawings show schematic diagrams of embodiments of the invention.

The universal rotary table, which is not shown in its entirety in the figures, includes, as a component of the cardan system, a rotatable and pivotable ring 10, which has a bearing surface 11 for accommodating an adjusting ring 12. . The adjustment ring has internal teeth 13 and adjustment screw 14
The lower segment frame 15 is screwed into this adjustment screw. Lower segment frame 1
The step 16 provided in the circular opening 17 of 5 forms a bearing surface for a support plate 18 which is firmly connected to the lower glass segment 19 . On the periphery of the lower segment frame 15, two guides 20 are provided diagonally opposite each other, and these guides are expediently formed in a raised manner. In the guide 20, there is an upper segment frame 2.
1 is insertable, and an upper glass segment 22 is fixed to the frame. The side surfaces of the upper segment frame 21 are shaped to fit into the guides 20 of the lower segment frame 15, ie the upper segment frame joins to said guides. In this way, the guide 20 allows the glass segments 19, 22
A very simple and precise centering of the segments is forced, and a cover glass 23 containing the object to be examined can be placed between these segments.

The lower segment frame 15 carries an adjusting device, which in this example is represented by a pinion, which meshes with the internal toothing 13 of the adjusting ring 12 . In order to rotate the pinion 24, an adjustment member 25 is provided, for example a knurled torsion rod to which a polygonal rod 26 is attached, which passes through a hole 27 in the upper segment frame and is inserted into the polygonal It can be inserted into a hole 28 provided in the pinion 24 to match the shape of the rod 26. It is clear that instead of such a pinion, it is also possible, for example, to use a pinion with one slot, and to use a precision machine screwdriver instead of the torsion rod used above.

In order to frictionally connect the upper segment frame 21 to the lower segment frame 15, two fastening screws 29, 30 are used, as is known in the art. These screws are screwed into the ring 10 through coaxial openings 31, 32 or 31', 32' provided in the segment frames 15, 21 and into the spring housing 33, respectively, to protect the cover glass 23. , 34.

[Brief explanation of the drawing]

The attached drawings are cross-sectional views of both segment frames. 12...Adjustment ring, 13...Inner tooth, 15,2
1... Segment frame, 24... Adjustment device, 25...
...Operation member.

Claims (1)

[Claims for Utility Model Registration] 1. An adjusting ring having glass segments fixed to the upper and lower segment frames and whose positions can be adjusted up and down, in which the lower segment frame is fixed to the rotating ring. In a universal rotary table for microscopy, in particular for the study of crystal optics, the upper segment frame 21 is centered and releasably supported with respect to the lower segment frame 15, as arranged on the adjustment screw. and both segment frame 1
Universal rotary table, characterized in that, in order to adjust both 5 and 21 up and down, an adjustment device 24 is provided which can be operated from above by means of an operating member 25 and which cooperates with the adjustment ring 12. 2. The universal rotary table according to claim 1, wherein the adjusting ring 12 has internal teeth that mesh with the adjusting device 24. 3. The universal rotary table according to claim 1 or 2, characterized in that the operating member 25 can be inserted into the adjustment device 24.